US6768383B2ExpiredUtilityA1
High-frequency amplifier
Assignee: MATSUSHITA ELECTRIC INDUSTRIAL CO LTDPriority: Dec 28, 2000Filed: Dec 14, 2001Granted: Jul 27, 2004
Est. expiryDec 28, 2020(expired)· nominal 20-yr term from priority
H03H 7/0123H03H 7/1766H03H 7/46H03F 3/60H01P 1/2007H03H 7/1758H03H 7/1791
45
PatentIndex Score
3
Cited by
7
References
97
Claims
Abstract
A bias circuit is provided for attenuating harmonic distortions of a signal having a simple construction and which can be applied to a high-frequency amplifier used in a communication device, such as a mobile telephone. The circuit reduces a voltage drop therein and thus provides a high-frequency amplifier having reduced power consumption and an increased operating efficiency. The high-frequency amplifier includes an amplifier circuit, an output matching circuit, and the bias circuit. In the bias circuit, a parallel circuit including a first transmission line and a first capacitor has one end connected between the amplifier and the output matching circuit. The other end of the parallel circuit is connected to a power source and is grounded via a second capacitor. In the circuit, the bias circuit can be short-circuited in a desired frequency band while being an open circuit in a frequency band of a signal to be amplified, hence attenuating the harmonic distortions without using a low pass filter.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1. A high-frequency amplifier comprising:
an amplifier circuit;
an output matching circuit connected to said amplifier circuit; and
a bias circuit comprising:
a first transmission line having a first end connected to a connection point between said amplifier circuit and said output matching circuit, said first transmission line having a second end connected to a power source;
a first capacitor connected in parallel with said first transmission line;
a second capacitor connected between said second end of said first transmission line and a ground; and
a second inductor connected in series with said second capacitor, said second inductor being connected between said second end of said first transmission line and said around.
2. A high-frequency amplifier comprising:
an amplifier circuit;
an output matching circuit comprising:
a first inductor having a first end connected to said amplifier circuit;
a first capacitor connected between a second end of said first inductor and a ground; and
a second capacitor connected between said first end of said first inductor and said ground;
a fourth capacitor connected in parallel with said first inductor: and a bias circuit comprising:
a first transmission line having a first end connected to said first end of said first inductor, said first transmission line having a second end connected to a power source; and
a third capacitor connected between said second end of said first transmission line and said ground.
3. A high-frequency amplifier comprising:
an amplifier circuit;
an output matching circuit connected to said amplifier circuit; and
a bias circuit comprising:
a first transmission line having a first end connected between said amplifier circuit and said output matching circuit;
a first capacitor connected between a second end of said first transmission line and a ground;
a second transmission line having a first end connected to said second end of said first transmission line, said second transmission line having a second end connected to a power source;
a first inductor connected between said second end of said first transmission line and said ground;
a third capacitor connected in series with said first inductor; and
a second capacitor connected between said second end of said second transmission line and said ground.
4. A high-frequency amplifier according to claim 3 , wherein said bias circuit further comprises:
a fourth capacitor connected in parallel with said second transmission line; and
a fourth inductor connected in series with said second capacitor.
5. A high-frequency amplifier according to claim 1 , further comprising:
a dielectric substrate; and
an electrode pattern on said dielectric substrate for forming a portion of said bias circuit.
6. A high-frequency amplifier according to claim 1 , further comprising:
a laminated body comprising a plurality of dielectric layers stacked therein; and
an electrode pattern on at least one of said dielectric layers, for forming a portion of said bias circuit.
7. A high-frequency amplifier comprising:
an amplifier circuit;
an output matching circuit connected to said amplifier circuit;
a first bias circuit comprising:
a first transmission line having a first end connected to a connection point between said amplifier circuit and said output matching circuit, said first transmission line having a second end connected to a power source; and
a first capacitor connected between said second end of said first transmission line and a ground; and
a second bias circuit comprising:
a second transmission line having a first end connected to said connection point between said amplifier circuit and said output matching circuit, said second transmission line having a second end connected to said power source,
wherein said output matching circuit comprises:
a first inductor having a first end connected to said amplifier circuit:
a fifth capacitor connected between a second end of said first inductor and said ground;
a sixth capacitor connected between said first end of said first inductor and said ground; and
a seventh capacitor connected in parallel with said first inductor.
8. A high-frequency amplifier according to claim 7 , wherein said second bias circuit further comprises a second capacitor connected between said second end of said second transmission line and said ground.
9. A high-frequency amplifier according to claim 7 , wherein said first bias circuit further comprises a third capacitor connected in parallel with said first transmission line.
10. A high-frequency amplifier according to claim 9 , wherein said second bias circuit further comprises a fourth capacitor connected in parallel with said second transmission line.
11. A high-frequency amplifier comprising:
an amplifier circuit;
an output matching circuit connected to said amplifier circuit;
a first bias circuit comprising:
a first transmission line having a first end connected to a connection point between said amplifier circuit and said output matching circuit, said first transmission line having a second end connected to a power source; and
a first capacitor connected between said second end of said first transmission line and a ground; and
a second bias circuit comprising:
a second transmission line having a first end connected to said connection point between said amplifier circuit and said output matching circuit, said second transmission line having a second end connected to said power source;
a second capacitor connected in parallel with said second transmission line;
a third capacitor connected between said second end of said second transmission line and said ground; and
a first inductor connected in series with said third capacitor, said first inductor being connected between said second end of said second transmission line and said ground.
12. A high-frequency amplifier comprising:
an amplifier circuit;
an output matching circuit connected to said amplifier circuit;
a first bias circuit comprising:
a first transmission line having a first end connected to said connection point between said amplifier circuit and said output matching circuit, said first transmission line having a second end connected to a power source;
a first capacitor connected between said second end of said first transmission line and a ground;
a second capacitor connected between said second end of said first transmission line and said ground; and
a first inductor connected in series with said second capacitor said first inductor being connected between said second end of said first transmission line and said around; and
a second bias circuit comprising:
a second transmission line having a first end connected to a connection point between said amplifier circuit and said output matching circuit, said second transmission line having a second end connected to said power source;
a third capacitor connected in parallel with said second transmission line;
a fourth capacitor connected between said second end of said second transmission line and said ground; and
a second inductor connected in series with said fourth capacitor, said second inductor being connected between said second end of said second transmission line and said ground.
13. A high-frequency amplifier comprising:
an amplifier circuit;
an output matching circuit connected to said amplifier circuit;
a first bias circuit comprising:
a first transmission line having a first end connected to a connection point between said amplifier circuit and said output matching circuit, said first transmission line having a second end connected to a power source;
a first capacitor connected in parallel with said first transmission line;
a second capacitor connected between said second end of said first transmission line and a ground; and
a first inductor connected in series with said second capacitor; and
a second bias circuit comprising:
a second transmission line having a first end connected to said connection point between said amplifier circuit and said output matching circuit;
a third capacitor connected between said second end of said second transmission line and said ground;
a third transmission line having a first end connected to said second end of said second transmission line, said third transmission line having a second end connected to said power source;
a second inductor connected between said first end of said third transmission line and said ground;
a fourth capacitor connected in series with said second inductor; and
a fifth capacitor connected between said second end of said third transmission line and said ground.
14. A high-frequency amplifier according to claim 13 , wherein said second bias circuit further comprises:
a sixth capacitor connected in parallel with said third transmission line; and
a third inductor connected in series with said fifth capacitor.
15. A high-frequency amplifier comprising:
an amplifier circuit;
an output matching circuit connected to said amplifier circuit;
a first bias circuit comprising:
a first transmission line having a first end connected to a connection point between said amplifier circuit and said output matching circuit, said first transmission line having a second end connected to a power source; and
a first capacitor connected between said second end of said first transmission line and a ground; and
a second bias circuit comprising:
a second transmission line having a first end connected to said connection point between said amplifier circuit and said output matching circuit;
a second capacitor connected between said second end of said second transmission line and said ground;
a third transmission line having a first end connected to said second end of said second transmission line, said third transmission line having a second end connected to said power source;
a first inductor connected between said first end of said third transmission line and said ground;
a third capacitor connected in series with said first inductor; and
a fourth capacitor connected between said second end of said third transmission line and said ground.
16. A high-frequency amplifier according to claim 15 , wherein said second bias circuit further comprises:
a fifth capacitor connected in parallel with said third transmission line; and
a second inductor connected in series with said fourth capacitor.
17. A high-frequency amplifier comprising:
an amplifier circuit;
an output matching circuit connected to said amplifier circuit;
a first bias circuit comprising:
a first transmission line having a first end connected to a connection point between said amplifier circuit and said output matching circuit;
a first capacitor connected between a second end of said first transmission line and a ground;
a second transmission line having a first end connected to said second end of said first transmission line, said second transmission line having a second end connected to a power source;
a first inductor connected between said first end of said second transmission line and said ground;
a second capacitor connected in series with said first inductor; and
a third capacitor connected between said second end of said second transmission line and said ground; and
a second bias circuit comprising:
a third transmission line having a first end connected to said connection point between said amplifier circuit and said output matching circuit;
a fourth capacitor connected between a second end of said third transmission line and said ground;
a fourth transmission line having a first end connected to said second end of said third transmission line, said fourth transmission line having a second end connected to said power source;
a second inductor connected between said first end of said fourth transmission line and said ground;
a fifth capacitor connected in series with said second inductor; and
a sixth capacitor connected between said second end of said fourth transmission line and said ground.
18. A high-frequency amplifier according to claim 17 , wherein said second bias circuit further comprises:
a seventh capacitor connected in parallel with said fourth transmission line; and
a third inductor connected in series with said sixth capacitor.
19. A high-frequency amplifier according to claim 18 , wherein said first bias circuit further comprises:
an eighth capacitor connected in parallel with said second transmission line; and
a fourth inductor connected in series with said third capacitor.
20. A high-frequency amplifier comprising:
an amplifier circuit;
an output matching circuit comprising:
a first inductor having a first end connected to said amplifier circuit;
a first capacitor connected between a second end of said first inductor and a ground;
a second capacitor connected between said first end of said first inductor and said ground; and
a seventh capacitor connected in parallel with said first inductor;
a first bias circuit comprising:
a first transmission line having a first end connected to said first end of said first inductor, said first transmission line having a second end connected to a power source; and
a third capacitor connected between said second end of said first transmission line and said ground; and
a second bias circuit comprising:
a second transmission line having a first end connected to said second end of said first inductor, said second transmission line having a second end connected to said power source.
21. A high-frequency amplifier according to claim 20 , wherein said second bias circuit further comprises a fourth capacitor connected between said second end of said second transmission line and said ground.
22. A high-frequency amplifier according to claim 20 , wherein said first bias circuit further comprises a fifth capacitor connected in parallel with said first transmission line.
23. A high-frequency amplifier according to claim 20 , wherein said second bias circuit further comprises a sixth capacitor connected in parallel with said second transmission line.
24. A high-frequency amplifier comprising:
an amplifier circuit;
an output matching circuit comprising:
a first inductor having a first end connected to said amplifier circuit;
a first capacitor connected between a second end of said first inductor and a ground; and
a second capacitor connected between said first end of said first inductor and said ground;
a first bias circuit comprising:
a first transmission line having a first end connected to said first end of said first inductor, said first transmission line having a second end connected to a power source; and
a third capacitor connected between said second end of said first transmission line and said ground; and
a second bias circuit comprising:
a second transmission line having a first end connected to said first end of said first inductor, said second transmission line having a second end connected to said power source;
a fourth capacitor connected in parallel with said second transmission line;
a fifth capacitor connected between said second end of said second transmission line and said ground; and
a second inductor connected in series with said fifth capacitor, said second inductor being connected between said second end of said second transmission line and said around.
25. A high-frequency amplifier comprising:
an amplifier circuit;
an output matching circuit comprising:
a first inductor having a first end connected to said amplifier circuit;
a first capacitor connected between a second end of said first inductor and a ground; and
a second capacitor connected between said first end of said first inductor and said ground;
a first bias circuit comprising:
a first transmission line having a first end connected to said first end of said first inductor, said first transmission line having a second end connected to a power source; and
a third capacitor connected between said second end of said first transmission line and said ground; and
a second bias circuit comprising:
a second transmission line having a first end connected to said second end of said first inductor;
a fourth capacitor connected between a second end of said second transmission line and said ground;
a third transmission line having a first end connected to said second end of said second transmission line, said third transmission line having a second end connected to said power source;
a second inductor connected between said first end of said third transmission line and said ground;
a fifth capacitor connected in series with said second inductor; and
a sixth capacitor connected between said second end of said third transmission line and said ground.
26. A high-frequency amplifier according to claim 25 , wherein said second bias circuit further comprises:
a seventh capacitor connected in parallel with said third transmission line, and
a third inductor connected in series with said sixth capacitor.
27. A high-frequency amplifier comprising:
an amplifier circuit;
an output matching circuit comprising:
a first inductor having a first end connected to said amplifier circuit;
a first capacitor connected between a second end of said first inductor and a ground; and
a second capacitor connected between said first end of said first inductor and said ground;
a first bias circuit comprising:
a first transmission line having a first end connected to said first end of said first inductor, said first transmission line having a second end connected to a power source;
a third capacitor connected in parallel with said first transmission line;
a fourth capacitor connected between said second end of said first transmission line and said ground; and
a second inductor connected in series with said fourth capacitor; and
a second bias circuit comprising:
a second transmission line having a first end connected to said first end of said first inductor, said second transmission line having a second end connected to said power source; and
a fifth capacitor connected between said second end of said second transmission line and said ground.
28. A high-frequency amplifier comprising:
an amplifier circuit;
an output matching circuit comprising:
a first inductor having a first end connected to said amplifier circuit;
a first capacitor connected between a second end of said first inductor and a ground; and
a second capacitor connected between said first end of said first inductor and said ground;
a first bias circuit comprising:
a first transmission line having a first end connected to said first end of said first inductor, said first transmission line having a second end connected to a power source;
a third capacitor connected in parallel with said first transmission line;
a fourth capacitor connected between said second end of said first transmission line and said ground; and
a second inductor connected in series with said fourth capacitor, said second inductor being connected between said second end of said first transmission line and said ground; and
a second bias circuit comprising:
a second transmission line having a first end connected to said first end of said first inductor, said second transmission line having a second end connected to said power source;
a fifth capacitor connected in parallel with said second transmission line;
a sixth capacitor connected between said second end of said second transmission line and said ground; and
a third inductor connected in series with said sixth capacitor said third inductor being connected between said second end of said second transmission line and said around.
29. A high-frequency amplifier comprising:
an amplifier circuit;
an output matching circuit comprising:
a first inductor having a first end connected to said amplifier circuit;
a first capacitor connected between a second end of said first inductor and a ground; and
a second capacitor connected between said first end of said first inductor and said ground;
a first bias circuit comprising:
a first transmission line having a first end connected to said first end of said first inductor, said first transmission line having a second end connected to a power source;
a third capacitor connected in parallel with said first transmission line;
a fourth capacitor connected between said second end of said first transmission line and said ground; and
a second inductor connected in series with said fourth capacitor; and
a second bias circuit comprising:
a second transmission line having a first end connected to said second end of said first inductor;
a fifth capacitor connected between a second end of said second transmission line and said ground;
a third transmission line having a first end connected to said second end of said second transmission line, said third transmission line having a second end connected to said power source;
a third inductor connected between said first end of said third transmission line and said ground;
a sixth capacitor connected in series with said third inductor; and
a seventh capacitor connected between said second end of said third transmission line and said ground.
30. A high-frequency amplifier according to claim 29 , wherein said second bias circuit further comprises:
an eighth capacitor connected in parallel with said third transmission line; and
a fourth inductor connected in series with said seventh capacitor.
31. A high-frequency amplifier comprising:
an amplifier circuit;
an output matching circuit comprising:
a first inductor having a first end connected to said amplifier circuit;
a first capacitor connected between a second end of said first inductor and a ground; and
a second capacitor connected between said first end of said first inductor and said ground;
a first bias circuit comprising:
a first transmission line having a first end connected to said first end of said first inductor;
a third capacitor connected between a second end of said first transmission line and said ground;
a second transmission line having a first end connected to said second end of said first transmission line, said second transmission line having a second end connected to a power source;
a second inductor connected between said first end of said second transmission line and said ground;
a fourth capacitor connected in series with said second inductor; and
a fifth capacitor connected between said second end of said second transmission line and said ground; and
a second bias circuit comprising:
a third transmission line having a first end connected to said first end of said first inductor, said third transmission line having a second end connected to said power source;
a sixth capacitor connected in parallel with said third transmission line;
a seventh capacitor connected between said second end of said third transmission line and said ground; and
a third inductor connected in series with said seventh capacitor.
32. A high-frequency amplifier according to claim 31 , wherein said first bias circuit further comprises:
an eighth capacitor connected in parallel with said second transmission line; and
a fourth inductor connected in series with said fifth capacitor.
33. A high-frequency amplifier comprising:
an amplifier circuit;
an output matching circuit comprising:
a first inductor having a first end connected to said amplifier circuit;
a first capacitor connected between a second end of said first inductor and said ground; and
a second capacitor connected between said first end of said first inductor and a ground;
a first bias circuit comprising:
a first transmission line having a first end connected to said first end of said first inductor;
a third capacitor connected between a second end of said first transmission line and said ground;
a second transmission line having a first end connected to said second end of said first transmission line, said second transmission line having a second end connected to a power source;
a second inductor connected between said first end of said second transmission line and said ground;
a fourth capacitor connected in series with said second inductor; and
a fifth capacitor connected between said second end of said second transmission line and said ground; and
a second bias circuit comprising:
a third transmission line having a first end connected to said second end of said first inductor, said third transmission line having a second end connected to said power source;
a sixth capacitor connected in parallel with said third transmission line;
a seventh capacitor connected between said second end of said third transmission line and said ground; and
a third inductor connected in series with said seventh capacitor.
34. A high-frequency amplifier according to claim 33 , wherein said first bias circuit further comprises:
an eighth capacitor connected in parallel with said second transmission line; and
a fourth inductor connected in series with said fifth capacitor.
35. A high-frequency amplifier comprising:
an amplifier circuit;
an output matching circuit comprising:
a first inductor having a first end connected to said amplifier circuit;
a first capacitor connected between a second end of said first inductor and a ground; and
a second capacitor connected between said first end of said first inductor and said ground;
a first bias circuit comprising:
a first transmission line having a first end connected to said first end of said first inductor;
a third capacitor connected between a second end of said first transmission line and said ground;
a second transmission line having a first end connected to said second end of said first transmission line, said second transmission line having a second end connected to a power source;
a second inductor connected between said first end of said second transmission line and said ground;
a fourth capacitor connected in series with said second inductor; and
a fifth capacitor connected between said second end of said second transmission line and said ground; and
a second bias circuit comprising:
a third transmission line having a first end connected to said first end of said first inductor;
a sixth capacitor connected between a second end of said third transmission line and said ground;
a fourth transmission line having a first end connected to said second end of said third transmission line, said fourth transmission line having a second end connected to said power source;
a third inductor connected between said first end of said fourth transmission line and said ground;
a seventh capacitor connected in series with said third inductor; and
an eighth capacitor connected between said second end of said fourth transmission line and said ground.
36. A high-frequency amplifier according to claim 35 , wherein said first bias circuit further comprises:
a ninth capacitor connected in parallel with said second transmission line; and
a fourth inductor connected in series with said fifth capacitor.
37. A high-frequency amplifier according to claim 36 , wherein said second bias circuit further comprises:
a tenth capacitor connected in parallel with said fourth transmission line; and
a fifth inductor connected in series with said eighth capacitor.
38. A high-frequency amplifier according to claim 24 , wherein said output matching circuit further comprises a parallel capacitor connected in parallel with said first inductor.
39. A high-frequency amplifier according to claim 7 , further comprising:
a dielectric substrate; and
an electrode pattern on said dielectric substrate, for forming at least a portion of said first and second bias circuits.
40. A high-frequency amplifier according to claim 7 , further comprising:
a laminated body comprising a plurality of dielectric layers stacked therein; and
an electrode pattern on at least one of said dielectric layers, for forming a portion of said first and second bias circuits.
41. A communication device comprising:
said high-frequency amplifier according to claim 1 .
42. A high-frequency amplifier according to claim 2 , further comprising:
a dielectric substrate; and
an electrode pattern on said dielectric substrate for forming a portion of said bias circuit.
43. A high-frequency amplifier according to claim 2 , further comprising:
a laminated body comprising a plurality of dielectric layers stacked therein; and
an electrode pattern on at least one of said dielectric layers, for forming a portion of said bias circuit.
44. A high-frequency amplifier according to claim 3 , further comprising:
a dielectric substrate; and
an electrode pattern on said dielectric substrate for forming a portion of said bias circuit.
45. A high-frequency amplifier according to claim 3 , further comprising:
a laminated body comprising a plurality of dielectric layers stacked therein; and
an electrode pattern on at least one of said dielectric layers, for forming a portion of said bias circuit.
46. A high-frequency amplifier according to claim 25 , wherein said output matching circuit further comprises a parallel capacitor connected in parallel with said first inductor.
47. A high-frequency amplifier according to claim 27 , wherein said output matching circuit further comprises a parallel capacitor connected in parallel with said first inductor.
48. A high-frequency amplifier according to claim 29 , wherein said output matching circuit further comprises a parallel capacitor connected in parallel with said first inductor.
49. A high-frequency amplifier according to claim 31 , wherein said output matching circuit further comprises a parallel capacitor connected in parallel with said first inductor.
50. A high-frequency amplifier according to claim 33 , wherein said output matching circuit further comprises a parallel capacitor connected in parallel with said first inductor.
51. A high-frequency amplifier according to claim 35 , wherein said output matching circuit further comprises a parallel capacitor connected in parallel with said first inductor.
52. A high-frequency amplifier according to claim 7 , further comprising:
a dielectric substrate; and
an electrode pattern an said dielectric substrate, for forming at least a portion of said first and second bias circuits.
53. A high-frequency amplifier according to claim 11 , further comprising:
a dielectric substrate; and
an electrode pattern on said dielectric substrate, for forming at least a portion of said first and second bias circuits.
54. A high-frequency amplifier according to claim 12 , further comprising:
a dielectric substrate; and
an electrode pattern on said dielectric substrate, for forming at least a portion of said first and second bias circuits.
55. A high-frequency amplifier according to claim 13 , further comprising:
a dielectric substrate; and
an electrode pattern an said dielectric substrate, for forming at least a portion of said first and second bias circuits.
56. A high-frequency amplifier according to claim 15 , further comprising:
a dielectric substrate; and
an electrode pattern on said dielectric substrate, for forming at least a portion of said first and second bias circuits.
57. A high-frequency amplifier according to claim 17 , further comprising:
a dielectric substrate; and
an electrode pattern on said dielectric substrate, for forming at least a portion of said first and second bias circuits.
58. A high-frequency amplifier according to claim 20 , further comprising:
a dielectric substrate; and
an electrode pattern on said dielectric substrate, for forming at least a portion of said first and second bias circuits.
59. A high-frequency amplifier according to claim 24 , further comprising:
a dielectric substrate; and
an electrode pattern on said dielectric substrate, for forming at least a portion of said first and second bias circuits.
60. A high-frequency amplifier according to claim 25 , further comprising:
a dielectric substrate; and
an electrode pattern on said dielectric substrate, for forming at least a portion of said first and second bias circuits.
61. A high-frequency amplifier according to claim 27 , further comprising:
a dielectric substrate; and
an electrode pattern on said dielectric substrate, for forming at least a portion of said first and second bias circuits.
62. A high-frequency amplifier according to claim 28 , further comprising:
a dielectric substrate; and
an electrode pattern on said dielectric substrate, for forming at least a portion of said first and second bias circuits.
63. A high-frequency amplifier according to claim 29 , further comprising:
a dielectric substrate; and
an electrode pattern on said dielectric substrate, for forming at least a portion of said first and second bias circuits.
64. A high-frequency amplifier according to claim 31 , further comprising:
a dielectric substrate; and
an electrode pattern on said dielectric substrate, for forming at least a portion of said first and second bias circuits.
65. A high-frequency amplifier according to claim 33 , further comprising:
a dielectric substrate; and
an electrode pattern on said dielectric substrate, for forming at least a portion of said first and second bias circuits.
66. A high-frequency amplifier according to claim 35 , further comprising:
a dielectric substrate; and
an electrode pattern on said dielectric substrate, for forming at least a portion of said first and second bias circuits.
67. A high-frequency amplifier according to claim 11 , further comprising:
a laminated body comprising a plurality of dielectric layers stacked therein; and
an electrode pattern on at least one of said dielectric layers, for forming a portion of said first and second bias circuits.
68. A high-frequency amplifier according to claim 12 , further comprising
a laminated body comprising a plurality of dielectric layers stacked therein; and
an electrode pattern on at least one of said dielectric layers, for forming a portion of said first and second bias circuits.
69. A high-frequency amplifier according to claim 13 , further comprising:
a laminated body comprising a plurality of dielectric layers stacked therein; and
an electrode pattern on at least one of said dielectric layers, for forming a portion of said first and second bias circuits.
70. A high-frequency amplifier according to claim 15 , further comprising:
a laminated body comprising a plurality of dielectric layers stacked therein; and
an electrode pattern on at least one of said dielectric layers, for forming a portion of said first and second bias circuits.
71. A high-frequency amplifier according to claim 17 , further comprising:
a laminated body comprising a plurality of dielectric layers stacked therein; and
an electrode pattern on at least one of said dielectric layers, for forming a portion of said first and second bias circuits.
72. A high-frequency amplifier according to claim 20 , further comprising:
a laminated body comprising a plurality of dielectric layers stacked therein; and
an electrode pattern on at least one of said dielectric layers, for forming a portion of said first and second bias circuits.
73. A high-frequency amplifier according to claim 24 , further comprising:
a laminated body comprising a plurality of dielectric layers stacked therein; and
an electrode pattern on at least one of said dielectric layers, for forming a portion of said first and second bias circuits.
74. A high-frequency amplifier according to claim 25 , further comprising:
a laminated body comprising a plurality of dielectric layers stacked therein; and
an electrode pattern on at least one of said dielectric layers, for forming a portion of said first and second bias circuits.
75. A high-frequency amplifier according to claim 27 , further comprising:
a laminated body comprising a plurality of dielectric layers stacked therein; and
an electrode pattern on at least one of said dielectric layers, for forming a portion of said first and second bias circuits.
76. A high-frequency amplifier according to claim 28 , further comprising:
a laminated body comprising a plurality of dielectric layers stacked therein; and
an electrode pattern on at least one of said dielectric layers, for forming a portion of said first and second bias circuits.
77. A high-frequency amplifier according to claim 29 , further comprising:
a laminated body comprising a plurality of dielectric layers stacked therein; and
an electrode pattern on at least one of said dielectric layers, for forming a portion of said first and second bias circuits.
78. A high-frequency amplifier according to claim 31 , further comprising:
a laminated body comprising a plurality of dielectric layers stacked therein; and
an electrode pattern on at least one of said dielectric layers, for forming a portion of said first and second bias circuits.
79. A high-frequency amplifier according to claim 22 , further comprising:
a laminated body comprising a plurality of dielectric layers stacked therein; and
an electrode pattern on at least one of said dielectric layers, for forming a portion of said first and second bias circuits.
80. A high-frequency amplifier according to claim 35 , further comprising:
a laminated body comprising a plurality of dielectric layers stacked therein; and
an electrode pattern on at least one of said dielectric layers, for forming a portion of said first and second bias circuits.
81. A communication device comprising:
said high-frequency amplifier according to claim 2 .
82. A communication device comprising: said high-frequency amplifier according to claim 3 .
83. A communication device comprising:
said high-frequency amplifier according to claim 7 .
84. A communication device comprising:
said high-frequency amplifier according to claim 11 .
85. A communication device comprising:
said high-frequency amplifier according to claim 12 .
86. A communication device comprising:
said high-frequency amplifier according to claim 13 .
87. A communication device comprising:
said high-frequency amplifier according to claim 15 .
88. A communication device comprising:
said high-frequency amplifier according to claim 17 .
89. A communication device comprising:
said high-frequency amplifier according to claim 20 .
90. A communication device comprising:
said high-frequency amplifier according to claim 24 .
91. A communication device comprising:
said high-frequency amplifier according to claim 25 .
92. A communication device comprising:
said high-frequency amplifier according to claim 27 .
93. A communication device comprising:
said high-frequency amplifier according to claim 28 .
94. A communication device comprising:
said high-frequency amplifier according to claim 29 .
95. A communication device comprising:
said high-frequency amplifier according to claim 31 .
96. A communication device comprising:
said high-frequency amplifier according to claim 33 .
97. A communication device comprising:
said high-frequency amplifier according to claim 35 .Cited by (0)
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